Question

Solve the following system of equations.

x + 4y + z = –10
3x – 3y + 6z = –21
x + 2y + 2z = –10

(1, –2, –3)

(–4, –1, –2)

(–3, –2, –3)

(2, –2, –4)

Answer 1

1) Take the first two equations. Eliminate a variable by manipulating (multiplication or division) the equation so you have + and a - of the chosen variable (for example if you have -3x, get +3 x inthe other equation)
2)Add the two equations together, you should get an equation with 2 variables instead of 3
3)Do steps 1-2 with the 2nd and 3rd equations
4) you'll have 2 equations with 2 variables eliminate another variable (use steps 1-2) to bring it to 1 variable (an example of this would be 5y=6, 3z=43, 2x=2,etc)\

Answer 2

@elang it is aganst CoC to just give answers. This is due to the conflict with people posting exam questions here expecting an answer with no work. Please do not continue to post just answers.

Answer 3

omggg thank youu soo much @elang and sorry but you should really mind your own business @Outkast3r09

Answer 4

@priscillaam_0422 , I'm not saying you do not want to learn this stuff. I'm only explaining to elang that Openstudy has people who try to cheat on tests. Also, I am minding my business. My business is to make Openstudy the best students/teachers hub where people can learn and interact with others, and not have people coming here for direct answers (that would not be learning). There is Wolframalpha for that.

Answer 5

thanks outkast for the reminder.